JP2551568Y2 - Centrifugal pump strainer - Google Patents

Centrifugal pump strainer

Info

Publication number
JP2551568Y2
JP2551568Y2 JP1970391U JP1970391U JP2551568Y2 JP 2551568 Y2 JP2551568 Y2 JP 2551568Y2 JP 1970391 U JP1970391 U JP 1970391U JP 1970391 U JP1970391 U JP 1970391U JP 2551568 Y2 JP2551568 Y2 JP 2551568Y2
Authority
JP
Japan
Prior art keywords
plate
water
suction cover
pump
strainer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP1970391U
Other languages
Japanese (ja)
Other versions
JPH04109500U (en
Inventor
静夫 田中
泰人 窪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tsurumi Manufacturing Co Ltd
Original Assignee
Tsurumi Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tsurumi Manufacturing Co Ltd filed Critical Tsurumi Manufacturing Co Ltd
Priority to JP1970391U priority Critical patent/JP2551568Y2/en
Publication of JPH04109500U publication Critical patent/JPH04109500U/en
Application granted granted Critical
Publication of JP2551568Y2 publication Critical patent/JP2551568Y2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【考案の詳細な説明】 【0001】 【産業上の利用分野】本考案は、渦巻ポンプのストレー
ナーに関するものである。 【0002】 【従来の技術】渦巻ポンプにおいて、そのポンプ性能を
重視した場合にはサクションカバー上面と羽根板下縁と
の間隔を極力小さくすることが望ましく、また、固形物
を渦流室内に詰まらせないことを優先的に考えた場合に
はサクションカバー上面と羽根板下縁との間隔を大きく
しなければならない。 【0003】そしてサクションカバー上面と羽根板下縁
との間隔を広狭二様に変更し得る構造とした場合には、
ストレーナーもそれに対応するものでなければならな
い。つまり、サクションカバー上面と羽根板下縁との間
隔を狭小とした場合には細目のストレーナーによって固
形物をポンプ吸込口から遮断しなければならず、また、
サクションカバー上面と羽根板下縁との間隔を大きくし
た場合には粗目のストレーナーによって極く大形の固形
物のみを遮断すれば足りるのである。 【0004】 【考案が解決しようとする課題】サクションカバー上面
と羽根板下縁との間隔を広狭二様に変換し得る構造を有
していたとしても、ポンプ吸込口に附設されるストレー
ナーの粗さが一定不変であればその特性を発揮させるこ
とができない。また、細目のものと粗目のものと二種類
のストレーナーを用意しておき、これを渦流室内部の状
態に対応して使い分けるというのも不便なものである。 【0005】本考案の目的は、単一のストレーナーであ
って、その装着態様を変更するのみで、渦流室内部の状
態に対応し得るストレーナーを提供することにある。 【0006】 【問題を解決するための手段】本考案に係る渦巻ポンプ
のストレーナーでは、環状板の一方の端縁寄りにおい
て、多数の通水用細孔を穿設した固形物流入阻止板を横
設して上記環状板と一体となし、固形物流入阻止板の通
水用細孔よりも粗目の通水口を環状板の周側部に開設
し、固形物流入阻止板の一面をサクションカバーの下面
へ対向させて定着することにより通水口から通水用細孔
を経てポンプ吸込口に至る通水路が構成せられ、また、
固形物流入阻止板の他面をサクションカバーの下面へ対
向させて定着することにより通水口からサクションカバ
ーの下面を経てポンプ吸込口に至る通水路が構成される
ようにした。 【0007】 【作用】固形物流入阻止板の一面をサクションカバーの
下面へ対応させて定着した場合には、渦巻ポンプの駆動
時において、汚水中に混在している大きな固形物は固形
物流入阻止板により遮断され、通水用細孔により濾され
た水および微小な固形物のみがポンプ吸込口から吸い込
まれるので、渦流室内を詰まらせることはない。従っ
て、サクションカバー上面と羽根板下縁との間隔が狭小
に構成せられた渦流室内部の状態に対応し得ることにな
る。 【0008】また、固形物流入阻止板の他面をサクショ
ンカバーの下面へ対応させて定着した場合には、渦巻ポ
ンプの駆動時において、ポンプ吸込口を通過し得ないよ
うな極く大形の固形物のみが環状板により流入を阻止せ
られ、その余の固形物は水と共に粗目の通水口を通って
ポンプ吸込口から吸い込まれる。従って、サクションカ
バー上面と羽根板下縁との間隔が広く構成せられた渦流
室内部の状態に対応し得ることになる。 【0009】 【実施例】以下実施例の図面により説明をする。 【0010】1は金属製の環状板、2は環状板1の一方
の端縁1aに接近して横設状に固定された金属製の固形
物流入阻止板、3‥‥3は固形物流入阻止板2の板面に
配設された多数の通水用細孔、4は環状板1の周側部に
開設された通水口であって、前記通水用細孔3‥‥3よ
りも粗目に形成されている。H1は固形物流入阻止板2
の周辺部に穿設されたボルト挿通孔である。 【0011】5は下面オープン型のポンプケーシング、
6はポンプケーシング5内においてモーター軸7に嵌着
された羽根車、8は羽根車6の羽根板下縁6eと対向す
るサクションカバーであって、中央に吸込口9を穿設
し、外縁部分をポンプケーシング5の周壁下縁への取付
部10となし、かつ、該取付部10の一面10aが他面
10bよりも高く凸出した凸環状面に形成されている。
従って図のようにサクションカバー8の一面8aを羽
根板下縁6eに対向させた場合には渦流室11の軸方向
寸法は長くなり、また、図のようにサクションカバー
8の他面8bを羽根板下縁6eに対向させた場合には渦
流室11の軸方向寸法は短くなる。これらいずれかの状
態により締付ボルト12‥‥12を使用して、サクショ
ンカバー8をポンプケーシング5の周壁下縁へ着脱自在
に定着させるのである。 【0012】そして図の態様においてはサクションカ
バー8の上面と羽根板下縁6eとの間隔は狭小で、渦流
室11内に固形物が詰まり易い状態となる。この状態に
対応してストレーナーを装着する場合には、固形物流入
阻止板2の一面2aをサクションカバー8の下面へ対向
させ、環状板1の一方の端縁1aをサクションカバー8
の下面周辺部へ当接させた態様でボルト挿通孔H1から
取付ボルト13を挿通して定着することにより、通水口
4から通水用細孔3‥‥3を経てポンプ吸込口9に至る
通水路が構成されることになる。従って渦巻ポンプの駆
動時には、汚水中に混在している大きな固形物は固形物
流入阻止板2により遮断され、通水用細孔3‥‥3によ
り濾された水および微小な固形物のみがポンプ吸込口9
から吸い込まれるので、渦流室11内に大きな固形物が
詰まるのを避けることができる。 【0013】また、図の使用例におけるストレーナー
およびサクションカバー8を取り外し、サクションカバ
ー8を表返して一面8aを羽根板下縁6eに対向させた
の態様においてはサクションカバー8の上面と羽根
板下縁6eとの間隔は大きくなり、渦流室11内を固形
物が通過し易い状態となる。この状態に対応してストレ
ーナーを装着する場合には、固形物流入阻止板2の他面
2bをサクションカバー8の下面へ対向させ、環状板1
の他方の端縁1bをサクションカバー8の下面周辺部へ
当接させた態様でボルト挿通孔H1から取付ボルト13
を挿通して定着することにより、通水口4からサクショ
ンカバー8の下面を経てポンプ吸込口9に至る通水路が
構成されることになる。従って渦巻ポンプの駆動時に
は、ポンプ吸込口9を通過し得ないような極く大形の固
形物のみが環状板1により流入を阻止せられ、その余の
固形物が水と共に粗目の通水口4を通ってポンプ吸込口
9から吸い込まれ、軸方向の寸法が増大されている渦流
室11を容易に通過して詰まりを生じることはない。 【0014】 【考案の効果】本考案によれば、渦巻ポンプの吸込口に
附設されるストレーナーの取付方向を表裏に変更するだ
けの簡単な作業により、一個のストレーナーで渦流室内
部の状態に対応して粗目と細目の二様に変換し得るので
至極便利である。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strainer for a centrifugal pump. 2. Description of the Related Art In a centrifugal pump, it is desirable to minimize the distance between the upper surface of a suction cover and the lower edge of a vane plate when the performance of the pump is emphasized. If priority is given to the absence of such a gap, the distance between the upper surface of the suction cover and the lower edge of the blade must be increased. In the case where the distance between the upper surface of the suction cover and the lower edge of the blade plate can be changed in a wide and narrow manner,
The strainer must also be compatible. In other words, when the distance between the upper surface of the suction cover and the lower edge of the blade is narrow, solid matter must be cut off from the pump suction port by a fine strainer,
When the distance between the upper surface of the suction cover and the lower edge of the blade is increased, it is sufficient to block only extremely large solids with a coarse strainer. [0004] Even if the structure has a structure in which the distance between the upper surface of the suction cover and the lower edge of the blade plate can be changed in a wide and narrow manner, the roughening of the strainer attached to the pump suction port can be achieved. If the value is constant, the characteristics cannot be exhibited. It is also inconvenient to prepare two types of strainers, a fine one and a coarse one, and use them properly according to the state of the inside of the swirl chamber. An object of the present invention is to provide a single strainer which can respond to the state of the inside of the swirl chamber only by changing its mounting mode. [0006] In the strainer of the centrifugal pump according to the present invention, a solid inflow prevention plate having a large number of water passage pores is arranged laterally near one edge of the annular plate. The solid plate is formed integrally with the annular plate, and a water inlet that is coarser than the water hole of the solid inflow blocking plate is opened on the peripheral side of the annular plate. A water passage from the water inlet to the pump suction port through the water passage pore is formed by fixing to face the lower surface, and
By fixing the other surface of the solid inflow prevention plate with the other surface facing the lower surface of the suction cover, a water passage from the water inlet to the pump suction port through the lower surface of the suction cover was formed. When one surface of the solid substance inflow prevention plate is fixed to the lower surface of the suction cover, large solids mixed in the sewage are prevented from flowing in during the operation of the centrifugal pump. Only water and fine solids, which are blocked by the plate and filtered by the water passage pores, are sucked from the pump suction port, so that the swirl chamber is not clogged. Therefore, it is possible to correspond to the state of the inside of the swirl chamber in which the distance between the upper surface of the suction cover and the lower edge of the blade plate is narrow. Further, when the other surface of the solid substance inflow prevention plate is fixed to the lower surface of the suction cover so as to be fixed, an extremely large size that cannot pass through the pump suction port when the centrifugal pump is driven. Only the solids are prevented from flowing in by the annular plate, and the remaining solids are sucked from the pump inlet through the coarse water inlet together with water. Therefore, it is possible to cope with the state of the inside of the swirl chamber in which the distance between the upper surface of the suction cover and the lower edge of the blade plate is wide. An embodiment will be described below with reference to the drawings. Reference numeral 1 denotes a metal annular plate, 2 denotes a metal solid substance inflow prevention plate fixed in a horizontal position close to one edge 1a of the annular plate 1, and 3 ‥‥ 3 denotes a solid substance inflow plate. A large number of water passage holes 4 provided on the plate surface of the blocking plate 2 are water passage holes formed on the peripheral side of the annular plate 1 and are larger than the water passage holes 3 ‥‥ 3. It is coarsely formed. H1 is a solid inflow prevention plate 2
Is a bolt insertion hole formed in a peripheral portion of the bolt. 5 is an open bottom pump casing,
Reference numeral 6 denotes an impeller fitted to the motor shaft 7 in the pump casing 5, reference numeral 8 denotes a suction cover opposed to the lower edge 6e of the impeller plate 6 of the impeller 6, and a suction port 9 is formed at the center thereof. Is formed as a mounting portion 10 to the lower edge of the peripheral wall of the pump casing 5, and one surface 10a of the mounting portion 10 is formed as a convex annular surface protruding higher than the other surface 10b.
Thus the axial dimension of the vortex chamber 11 when made to face one surface 8a of the suction cover 8 to the blade plate lower edge 6e as shown in FIG. 1 becomes longer, also, the other surface 8b of the suction cover 8 as shown in FIG. 2 Is made to face the blade lower edge 6e, the axial dimension of the swirl chamber 11 becomes shorter. In any one of these states, the suction cover 8 is detachably fixed to the lower edge of the peripheral wall of the pump casing 5 by using the tightening bolts 12 # 12. In the embodiment shown in FIG. 2 , the space between the upper surface of the suction cover 8 and the lower edge 6e of the blade is small, so that the swirl chamber 11 is liable to be clogged with solids. When a strainer is mounted in accordance with this state, one surface 2a of the solid inflow prevention plate 2 is opposed to the lower surface of the suction cover 8, and one edge 1a of the annular plate 1 is
The mounting bolt 13 is inserted through the bolt insertion hole H1 in a state in which the fixing bolt 13 is brought into contact with the lower surface peripheral portion, and the fixing is performed, so that the water flows from the water inlet 4 to the pump inlet 9 through the water holes 3 細孔 3. A waterway will be constructed. Therefore, when the centrifugal pump is driven, large solid matter mixed in the sewage is blocked by the solid matter inflow prevention plate 2 and only water and fine solid matter filtered through the water passage pores 3 ‥‥ 3 are pumped. Suction port 9
Therefore, it is possible to prevent a large solid matter from being clogged in the swirl chamber 11. [0013] remove the strainer and the suction cover 8 in the example used in Figure 2, in the embodiment of FIG. 1 the suction cover 8 is opposed to the blade plate lower edge 6e one surface 8a returns table and the upper surface of the suction cover 8 The distance between the lower edge 6e and the blade plate 6e is increased, so that the solid material easily passes through the swirl chamber 11. When the strainer is mounted in accordance with this state, the other surface 2b of the solid inflow prevention plate 2 faces the lower surface of the suction cover 8, and the annular plate 1
The other end 1b of the mounting bolt 13 is attached to the peripheral portion of the lower surface of the suction cover 8 through the bolt insertion hole H1.
Is inserted and fixed, thereby forming a water passage from the water passage 4 to the pump suction port 9 through the lower surface of the suction cover 8. Therefore, when the centrifugal pump is driven, only the very large solids that cannot pass through the pump suction port 9 are prevented from flowing in by the annular plate 1, and the remaining solids together with the water are removed from the coarse water inlet 4. Through the swirl chamber 11 which is drawn through the pump suction port 9 and has an increased axial dimension without clogging. According to the present invention, one strainer can handle the state of the inside of the vortex chamber with a simple operation of changing the mounting direction of the strainer attached to the suction port of the volute pump to the front and back. It is very convenient because it can be converted into coarse and fine.

【図面の簡単な説明】 【図1】サクションカバー上面と羽根板下縁との間隔が
広くとられた状態に対応させて本考案ストレーナーを渦
巻ポンプの吸込口周辺に装着させた使用例を示す要部縦
断側面図である。 【図2】サクションカバー上面と羽根板下縁との間隔が
狭くとられた状態に対応させて本考案ストレーナーを渦
巻ポンプの吸込口周辺に装着させた使用例を示す要部縦
断側面図である。 【図3】本考案ストレーナーの平面図である。 【図4】本考案ストレーナーの縦断側面図である。 【符号の説明】 1 環状板 2 固形物流入阻止板 2a 固形物流入阻止板の一面 2b 固形物流入阻止板の他面 3 通水用細孔 4 通水口 8 サクションカバー 9 ポンプ吸込口
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows the distance between the upper surface of the suction cover and the lower edge of the blade.
Vortex the strainer of the present invention in accordance with the condition taken widely
Main part vertical showing an example of use attached around the suction port of a volume pump
It is a sectional side view. FIG. 2 shows the distance between the upper surface of the suction cover and the lower edge of the blade.
Vortex the strainer according to the present invention to correspond to the narrowed state.
Main part vertical showing an example of use attached around the suction port of a volume pump
It is a sectional side view. FIG. 3 is a plan view of the strainer of the present invention. FIG. 4 is a longitudinal side view of the strainer of the present invention. [Description of Signs] 1 Annular plate 2 Solid inflow prevention plate 2a One surface of solid inflow prevention plate 2b Other surface of solid inflow prevention plate 3 Pores for water passage 4 Water passage 8 Suction cover 9 Pump suction port

Claims (1)

(57)【実用新案登録請求の範囲】 環状板(1)の一方の端縁寄りにおいて、多数の通水用
細孔(3‥‥3)を穿設した固形物流入阻止板(2)を
横設して上記環状板(1)と一体となし、固形物流入阻
止板(2)の通水用細孔(3‥‥3)よりも粗目の通水
口(4)を環状板(1)の周側部に開設し、固形物流入
阻止板(2)の一面(2a)をサクションカバー(8)
の下面へ対向させて定着することにより通水口(4)か
ら通水用細孔(3‥‥3)を経てポンプ吸込口(9)に
至る通水路が構成せられ、また、固形物流入阻止板
(2)の他面(2b)をサクションカバー(8)の下面
へ対向させて定着することにより通水口(4)からサク
ションカバー(8)の下面を経てポンプ吸込口(9)に
至る通水路が構成されることを特徴とする、渦巻ポンプ
のストレーナー。
(57) [Claims for registration of utility model] A solid substance inflow prevention plate (2) having a large number of water passage holes (3 ‥‥ 3) is provided near one edge of the annular plate (1). The ring-shaped plate (1) is provided horizontally, and is integrally formed with the ring-shaped plate (1). And one side (2a) of the solid substance inflow prevention plate (2) is set on the suction side of the suction cover (8).
A water passage from the water inlet (4) to the pump suction port (9) through the water passage pores (3 ‥‥ 3) is formed by fixing the water to the lower surface of the water inlet, and the solid substance is prevented from flowing. The other surface (2b) of the plate (2) faces the lower surface of the suction cover (8) and is fixed so that the water flows from the water inlet (4) to the pump inlet (9) through the lower surface of the suction cover (8). A strainer for a centrifugal pump, wherein a water channel is formed.
JP1970391U 1991-03-05 1991-03-05 Centrifugal pump strainer Expired - Fee Related JP2551568Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1970391U JP2551568Y2 (en) 1991-03-05 1991-03-05 Centrifugal pump strainer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1970391U JP2551568Y2 (en) 1991-03-05 1991-03-05 Centrifugal pump strainer

Publications (2)

Publication Number Publication Date
JPH04109500U JPH04109500U (en) 1992-09-22
JP2551568Y2 true JP2551568Y2 (en) 1997-10-22

Family

ID=31905931

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1970391U Expired - Fee Related JP2551568Y2 (en) 1991-03-05 1991-03-05 Centrifugal pump strainer

Country Status (1)

Country Link
JP (1) JP2551568Y2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3049660B1 (en) * 2016-04-04 2021-10-15 Exel Ind SUBMERSIBLE PUMP AND PROCESS FOR STARTING UP SUCH A PUMP

Also Published As

Publication number Publication date
JPH04109500U (en) 1992-09-22

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